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Device for measuring radioactive contamination on large pieces

  • US 5,135,706 A
  • Filed: 10/19/1990
  • Issued: 08/04/1992
  • Est. Priority Date: 10/20/1989
  • Status: Expired due to Fees
First Claim
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1. Device to measure the radioactive contamination of objects via the detection of gamma radiations, wherein it includes:

  • at least two detection units each including a gamma radiation detector with a detection surface delivering a number of photons proportional to the number of gamma radiations detected, the two detectors being placed opposite and parallel to each other and spaced from each other by a distance able to be adjusted according to the width of the piece to be measured;

    a device to position the detection units according to the piece to be measured and constituted by a bearer structure;

    a system for lifting and moving the piece to be measured so as to have this piece pass between the two detection units and enabling the moving long pieces to be measured, anda system for recognizing the shape of the piece at the inlet of the two detection units constituted by a first luminous clip-on lens perpendicular to the distance covered by the piece and two second luminous clip-on lenses parallel to each other, perpendicular to the first luminous clip-on lens and each integral with one section of the bearer structure.

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